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"""
Config.py is a repository of the Cobbler object model
Copyright 2006, Red Hat, Inc
Michael DeHaan <mdehaan@redhat.com>
This software may be freely redistributed under the terms of the GNU
general public license.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
"""
import os
import weakref
import item_distro as distro
import item_profile as profile
import item_system as system
import item_repo as repo
import collection_distros as distros
import collection_profiles as profiles
import collection_systems as systems
import collection_repos as repos
import settings
import serializer
from rhpl.translate import _, N_, textdomain, utf8
class Config:
has_loaded = False
__shared_state = {}
def __init__(self,api):
"""
Constructor. Manages a definitive copy of all data collections with weakrefs
pointing back into the class so they can understand each other's contents
"""
self.__dict__ == Config.__shared_state
if not Config.has_loaded:
self.__load(api)
def __load(self,api):
Config.has_loaded = True
self.api = api
self._distros = distros.Distros(weakref.proxy(self))
self._profiles = profiles.Profiles(weakref.proxy(self))
self._systems = systems.Systems(weakref.proxy(self))
self._settings = settings.Settings() # not a true collection
self._repos = repos.Repos(weakref.proxy(self))
self._classes = [
self._settings,
self._distros,
self._profiles,
self._systems,
self._repos
]
self._graph_classes = [
self._distros,
self._profiles,
self._systems,
self._repos
]
self.file_check()
def __cmp(self,a,b):
return cmp(a.name,b.name)
def distros(self):
"""
Return the definitive copy of the Distros collection
"""
return self._distros
def profiles(self):
"""
Return the definitive copy of the Profiles collection
"""
return self._profiles
def systems(self):
"""
Return the definitive copy of the Systems collection
"""
return self._systems
def settings(self):
"""
Return the definitive copy of the application settings
"""
return self._settings
def repos(self):
"""
Return the definitive copy of the Repos collection
"""
return self._repos
def new_distro(self,is_subobject=False):
"""
Create a new distro object with a backreference to this object
"""
return distro.Distro(weakref.proxy(self),is_subobject=is_subobject)
def new_system(self,is_subobject=False):
"""
Create a new system with a backreference to this object
"""
return system.System(weakref.proxy(self),is_subobject=is_subobject)
def new_profile(self,is_subobject=False):
"""
Create a new profile with a backreference to this object
"""
return profile.Profile(weakref.proxy(self),is_subobject=is_subobject)
def new_repo(self,is_subobject=False):
"""
Create a new mirror to keep track of...
"""
return repo.Repo(weakref.proxy(self),is_subobject=is_subobject)
def clear(self):
"""
Forget about all loaded configuration data
"""
for x in self._classes:
x.clear()
return True
def file_check(self):
"""
Serialize any files that do not yet exist. This is useful for bringing the
app up to a working state on first run or if files are deleted. See api.py
"""
for x in self._classes:
if not os.path.exists(x.filename()):
if not serializer.serialize(x):
return False
return True
def serialize(self):
"""
Save the object hierarchy to disk, using the filenames referenced in each object.
"""
for x in self._classes:
if not serializer.serialize(x):
return False
return True
def deserialize(self):
"""
Load the object hierachy from disk, using the filenames referenced in each object.
"""
if not serializer.deserialize(self._settings,topological=False):
return False
for x in self._graph_classes:
if not serializer.deserialize(x,topological=True):
return False
return True
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